Bonita Industries sells two types of computer hard drives. The sales mix is 30% (Q-Drive) and 70% (Q-Drive Plus). Q-Drive has variable costs per unit of $60 and a selling price of $120. Q-Drive Plus has variable costs per unit of $75 and a selling price of $165. The weighted-average unit contribution margin for Bonita is

$81

$69.0

$60.0

$120